Improvement in quartz-crushers



WHELPLEY & STORER.

Quartz Crusher.

Patented Nov'14, 1865.

NoI 50,975I t UNITED 'STATES PATENT OEEICE.

JAMES D. VHELPLEY AND JACOB J. STORER, OF BOSTON, MASS.

IMPROVEMENT IN QUARTZ-CRUSH ERS.

Specification forming part of Letters Patent No. 50,975, dated'Novembcr 14, 1865.

To all whom fit may concern:

Be it known that we, J. D. WHELPLEY and J. J. STORER, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Pulverizing Mills, and we do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanyin g drawings, forming a part of this specication, in which- Figure 1 is a side elevation. Fig. 2 is a central vertical section in the line a: m ot' Fig. 1. Fig. 3 is a side elevation with the side O of the case removed.

Like parts are indicated by the same letters in all the drawings.

The nature of our improvement consists, first, in the employment ot' a xed disk, K, between the side of the case B and the revolving part of the mill, for the purpose of separating the revolving air within the mill from the air which has already left it on its way to a central exit, whereas, it' the air continued to revolve after leaving the mill, its escape from a central opening would be prevented by its own centrifugal force; second, in the employment of radial bars or partitions L to divide the space WV between the xed disk K and the side B of the mill into segments to prevent a circular motion of the air in the aforesaid interspaces.

To enable others skilled in the art` to make and use our invention, we will now proceed to describe the construction and operation of the same.

A is the periphery or cylindrical case, of common cast-iron or other appropriate metal, resting on a suitable foundation or frame; and B and O are the two sides of the case, of the same material, shaped as clearly shown in the drawings, and united to the said periphery by means of the ngers u t and screw-bolts b.

E is the hopper, into which the materials to be pulverized are placed, and Gr is a squarecornered feed-bar arranged in the hopper, as shown in Fig. 1, and turning in suitable bearings in the ends of the same, being rotated by means of a belt running over the pulley R.

F is a conductor, or a continuation of the hopper, leading to the central opening, V, in the side C of the case.

H is a slide-valve in the eonductorF to regulate the amount of air admitted into the mill.

K is a fixed conical disk placedbetween the rotating part of the mill and the conical side B, being connected to the latter by means of the radial bars or partitions L L L L, (see Fig. 3,) so as to leave segmental spaces W between the two, as represented in Fig. 2, the diameter of the said disk being somewhat less than the inside diameter of the mill, so as to allow a free passage from the body of the mill to the interspaces W, which latter open into the exitpipe or conductor 1.

YVe have represented the disk K and the side B as conical, considering that the preferable shape. It is obvious, however, that both of them might be hat or otherwise and answer the purpose. We have also represented four radial partitions, L. More or less of them, however, would accomplish the purpose required.

J is a sliding valve iu the pipe I to regulate the current of air from the mill, and the con sequent ineness of the yield.

The grinding or friction surfaces of mills of this description have hitherto been made of the same material and piece as the shell or case itself-usually of common castAiron-to which construction there are serious practical objections: First, they are too soft to work to the best advantage; and, second, they soon wear out or become fractured, in which case the whole mill has to be taken to pieces and a new case or shell, with all its appendages, boltholes, and nice adjustments, must be procured, or the whole mill be cast aside. To obviate these objections we line the shell or the cylindrical portion of it with a removable plate or plates, D, of chilled or hardened cast-iron, or what is known as franklinite iron, constructed of the same curvature as the periph ery A. This lining D may consist of a single cylinder or of a number of sections of a cylA inder, in the latter case the sections being confined to the caseAbymeans of screw bolts and nuts d, the bolts being castin thesections and passed through corresponding holes in the said case, as represented in Figs. 2 and 3. Plates thus constructed are exceeding hard and durable, and can readily be removed or inserted when it is required, and constitute, we think, a very valuable im provement in the art,

M is the axis of the pulverizing-beaters P, which are attached to the extremities of the radial arms O, as in other pulverizing-mills where rotating paddles or beaters are employed.

Q is a rotating disk attached to one side of the beater-Wheel, as represented in Figs. 2 and 3.

The novel features in the operation of our mill have been sufciently described in setting forth the nature ot' our invention.

What we claim as new, and desire to secure by Letters Patent, is-

1. The fixed disk K between the revolving part of the mill and the exit side of the case, substantially as set forth, and for the purpose described.

2. The radial partitions L in the space W between the disk K and the side of the mill, substantially as and for the purpose described, with or Without the plate or disk named iu the first claim.

JAMES D. WHELPLEY. JACOB J. STORER. Witnesses:

N. AMEs, GEO. R. CLARKE. 

